Improvement in picture-nails



G. VINTSCHGER.

' i Picture Nails.

No, 136,566, Patented March 4, 1873.

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UNITED STATES PATENT OFFICE.

GUsTAV VINTscHGEn, oF NEW YORK, N. YQ

'IMPRovEMENT' IN PlcTuRE-NAus.

Specification forming part of Letters Patent No. 136,566, dated March 4,1873.

To all whom it may concern:

Be it known that I, GUsTAv VINTSCHGER, of the city, county, and Stateot' New York,

'have invented a new and useful Improvement in Picture-Nails 5 and I dohereby declare the following to be a full, clear, and exact descriptionthereof, which will enable those skilled in the art to make and use thesame, reference being had to the accompanying drawing forming part ot'this specilication, in Which- Figure l represents a vertical centralsection of my invention. Fig. 2 is a side elevation ot' the same. Fig. 3is a plan or top view ofthe supporting-plate of the head.

Similar letters indicate corresponding parts.

This invention consists in a picture-nail having between its head andthe plate which supports said head a disk ot' sheet metal, provided witha central hole and with a series ot'radial slots, the supporting-plateof the head being provided with a hole to guide the nail to theretaining-disk in such a manner that the segments situated between theradial slots ofthe retaining-disk engage with the screw-thread of thenail, and as the nail is inserted through the hole of thesupporting-plate and turned round a firm connection is e'ected betweenthe head and the nail.

In the drawing, the letter A designates the head ot' my picture-nail,which rests in the supporting-plate a, this plate being provided with ailange that is pressed over the edge of the head so as to etect a firmconnection. Between the head and the 4supporting-plate is situated adisk, b, made of sheet metal, and provided with a centra-l hole, c, (seeFig. 3,)

from which radiate a series of slots, d. The segments situated betweenthese slots are slightly bent upward, (see Fig. 1,) and the hole c inthe disk bis made of such a size that the inner edges of said segmentsengage with the screw-threads at the end of the nail B. The supporting'plate a is provided with a ceutral hole that forms a guide to conductthe nail to the hole in the retaining-disk; and it also serves to steadythe head after the same has been screwed on the nail.

The retaining-disk b, as above described, is easily manufactured, andthe inner edges of the segments between the radial slots d readilyaccommodate themselves to the threads of the nail whenever the head isapplied to said nail; and, furthermore, by combining the guidehole ot'the supporting-plate with the reta-ining-disk the connection between thchead and the nail is firmly retained in position.

I do not claim a picture-nail having a circumferential groove near itshead for interlocking with the spring ends of the base-plate thatsupport-s a porcelain cap, as such is not my invention; but

What I claim as new, and desire to secure by Letters Patent, is

The retaining-disk b, provided with a series of radial slots, d, incombination with the supporting-plate a, head A, and screw-headed nailB, all the parts being constructed substantially in the manner hereinshown and described.

GUSTAV VINTSCHGE R.

Witnesses:

W. HAUFF, E. F. KASTENHUBER.

